Diff of /trunk/src/osm-gps-map-osd-classic.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 122 by harbaum, Mon Sep 21 13:15:25 2009 UTC revision 132 by harbaum, Thu Oct 1 08:09:00 2009 UTC
# Line 19  Line 19 
19    
20  #include "config.h"  #include "config.h"
21  #include <stdlib.h>  // abs  #include <stdlib.h>  // abs
22    #include <string.h>
23  #include <math.h>    // M_PI/cos()  #include <math.h>    // M_PI/cos()
24    
25  /* parameters that can be overwritten from the config file: */  /* parameters that can be overwritten from the config file: */
26  /* OSD_DIAMETER */  /* OSD_DIAMETER */
27  /* OSD_X, OSD_Y */  /* OSD_X, OSD_Y */
28    
 #define OSD_NAV  
   
29  #ifndef USE_CAIRO  #ifndef USE_CAIRO
30  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
31  #endif  #endif
# Line 81  typedef struct { Line 80  typedef struct {
80  #ifdef OSD_NAV  #ifdef OSD_NAV
81      struct {      struct {
82          cairo_surface_t *surface;          cairo_surface_t *surface;
83            float lat, lon;
84            char *name;
85      } nav;      } nav;
86  #endif  #endif
87    
# Line 1071  osd_zoom_labels(cairo_t *cr, gint x, gin Line 1072  osd_zoom_labels(cairo_t *cr, gint x, gin
1072  #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)  #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1073    
1074  #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)  #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1075  #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+OSD_COORDINATES_OFFSET)  #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4)
1076    
1077  /* these can be overwritten with versions that support */  /* these can be overwritten with versions that support */
1078  /* localization */  /* localization */
# Line 1129  static char Line 1130  static char
1130                             c, (int)integral, fractional*60.0);                             c, (int)integral, fractional*60.0);
1131  }  }
1132    
1133    /* render a string at the given screen position */
1134    static int
1135    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1136        char *p = g_strdup(text);
1137        cairo_text_extents_t extents;
1138        cairo_text_extents (cr, p, &extents);
1139    
1140        /* check if text needs to be truncated */
1141        int len = strlen(text)-2;
1142        while(extents.width > width) {
1143            len--;
1144            strcpy(p+len, "...");
1145            cairo_text_extents (cr, p, &extents);
1146        }
1147    
1148        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1149        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1150        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1151        cairo_text_path (cr, p);
1152        cairo_stroke (cr);
1153    
1154        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1155        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1156        cairo_show_text (cr, p);
1157    
1158        g_free(p);
1159    
1160        /* skip + 1/4 line */
1161        return y + 5*OSD_COORDINATES_FONT_SIZE/4;
1162    }
1163    
1164  static void  static void
1165  osd_render_coordinates(osm_gps_map_osd_t *osd)  osd_render_coordinates(osm_gps_map_osd_t *osd)
1166  {  {
# Line 1164  osd_render_coordinates(osm_gps_map_osd_t Line 1196  osd_render_coordinates(osm_gps_map_osd_t
1196      char *latitude = osd_latitude_str(lat);      char *latitude = osd_latitude_str(lat);
1197      char *longitude = osd_longitude_str(lon);      char *longitude = osd_longitude_str(lon);
1198    
1199      cairo_text_extents_t lat_extents, lon_extents;      int y = OSD_COORDINATES_OFFSET;
1200      cairo_text_extents (cr, latitude, &lat_extents);      y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1201      cairo_text_extents (cr, longitude, &lon_extents);      y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1202    
     cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);  
     cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);  
     cairo_move_to (cr,  
                    (OSD_COORDINATES_W - lat_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lat_extents.y_bearing);  
     cairo_text_path (cr, latitude);  
     cairo_move_to (cr,  
                    (OSD_COORDINATES_W - lon_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lon_extents.y_bearing +  
                    OSD_COORDINATES_FONT_SIZE);  
     cairo_text_path (cr, longitude);  
     cairo_stroke (cr);  
   
     cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);  
     cairo_move_to (cr,  
                    (OSD_COORDINATES_W - lat_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lat_extents.y_bearing);  
     cairo_show_text (cr, latitude);  
     cairo_move_to (cr,  
                    (OSD_COORDINATES_W - lon_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lon_extents.y_bearing +  
                    OSD_COORDINATES_FONT_SIZE);  
     cairo_show_text (cr, longitude);  
   
1203      g_free(latitude);      g_free(latitude);
1204      g_free(longitude);      g_free(longitude);
1205    
# Line 1200  osd_render_coordinates(osm_gps_map_osd_t Line 1208  osd_render_coordinates(osm_gps_map_osd_t
1208  #endif  // OSD_COORDINATES  #endif  // OSD_COORDINATES
1209    
1210  #ifdef OSD_NAV  #ifdef OSD_NAV
1211  #define OSD_NAV_W  (100)  #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1212  #define OSD_NAV_H  (100)  #define OSD_NAV_H  (130)
1213    
1214    /* http://mathforum.org/library/drmath/view/55417.html */
1215    static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1216      return atan2( sin(lon2 - lon1) * cos(lat2),
1217                    cos(lat1) * sin(lat2) -
1218                    sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1219    }
1220    
1221    /* http://mathforum.org/library/drmath/view/51722.html */
1222    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1223      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1224                       sin(lat1) * sin(lat2));
1225    
1226      //  return(aob * 3959.0);   /* great circle radius in miles */
1227    
1228      return(aob * 6371000.0);     /* great circle radius in meters */
1229    }
1230    
1231  static void  static void
1232  osd_render_nav(osm_gps_map_osd_t *osd)  osd_render_nav(osm_gps_map_osd_t *osd)
1233  {  {
1234      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1235    
1236        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1237            return;
1238    
1239      /* first fill with transparency */      /* first fill with transparency */
1240      cairo_t *cr = cairo_create(priv->nav.surface);      cairo_t *cr = cairo_create(priv->nav.surface);
1241      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1242      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1243      cairo_paint(cr);      cairo_paint(cr);
1244      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1245    
1246        cairo_select_font_face (cr, "Sans",
1247                                CAIRO_FONT_SLANT_NORMAL,
1248                                CAIRO_FONT_WEIGHT_BOLD);
1249        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1250    
1251        char *latitude = osd_latitude_str(priv->nav.lat);
1252        char *longitude = osd_longitude_str(priv->nav.lon);
1253    
1254        int y = OSD_COORDINATES_OFFSET;
1255        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1256        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1257        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1258    
1259        g_free(latitude);
1260        g_free(longitude);
1261    
1262        /* draw the compass */
1263        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1264        if(radius > OSD_NAV_W/2)
1265            radius = OSD_NAV_W/2;
1266    
1267        int x = OSD_NAV_W/2+1;
1268        y += radius;
1269    
1270        cairo_stroke (cr);
1271    
1272        /* draw background */
1273        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1274        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1275        cairo_fill_preserve (cr);
1276        cairo_set_source_rgb (cr, 0, 0, 0);
1277        cairo_set_line_width (cr, 1);
1278        cairo_stroke (cr);
1279    
1280        /* draw pointer */
1281    #define ARROW_WIDTH     0.3
1282    #define ARROW_LENGTH    0.7
1283    
1284        coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1285        if(gps) {
1286            float arot = get_bearing(gps->rlat, gps->rlon,
1287                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1288    
1289            cairo_move_to(cr,
1290                          x + radius *  ARROW_LENGTH *  sin(arot),
1291                          y + radius *  ARROW_LENGTH * -cos(arot));
1292    
1293            cairo_line_to(cr,
1294                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1295                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1296    
1297            cairo_line_to(cr,
1298                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1299                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1300    
1301            cairo_line_to(cr,
1302                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1303                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1304    
1305            cairo_close_path(cr);
1306            cairo_set_source_rgb (cr, 0, 0, 0);
1307            cairo_fill (cr);
1308    
1309            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1310    
1311            float dist = get_distance(gps->rlat, gps->rlon,
1312                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1313    
1314            char *dist_str = NULL;
1315            if(dist<1000)
1316                dist_str = g_strdup_printf("%u m", (int)dist);
1317            else
1318                dist_str = g_strdup_printf("%.1f km", dist/1000);
1319    
1320            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1321            g_free(dist_str);
1322        }
1323    
1324      cairo_destroy(cr);      cairo_destroy(cr);
1325  }  }
1326    
1327    void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1328        g_return_if_fail (OSM_IS_GPS_MAP (map));
1329    
1330        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1331        g_return_if_fail (osd);
1332    
1333        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1334        g_return_if_fail (priv);
1335    
1336        if(priv->nav.surface) {
1337            cairo_surface_destroy(priv->nav.surface);
1338            priv->nav.surface = NULL;
1339            priv->nav.lat = OSM_GPS_MAP_INVALID;
1340            priv->nav.lon = OSM_GPS_MAP_INVALID;
1341            if(priv->nav.name) g_free(priv->nav.name);
1342        }
1343        osm_gps_map_redraw(map);
1344    }
1345    
1346    void
1347    osm_gps_map_osd_draw_nav (OsmGpsMap *map, float latitude, float longitude,
1348                              char *name) {
1349        g_return_if_fail (OSM_IS_GPS_MAP (map));
1350    
1351        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1352        g_return_if_fail (osd);
1353    
1354        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1355        g_return_if_fail (priv);
1356    
1357        osm_gps_map_osd_clear_nav (map);
1358    
1359        /* allocate balloon surface */
1360        priv->nav.surface =
1361            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1362                                       OSD_NAV_W+2, OSD_NAV_H+2);
1363    
1364        priv->nav.lat = latitude;
1365        priv->nav.lon = longitude;
1366        priv->nav.name = g_strdup(name);
1367    
1368        osd_render_nav(osd);
1369    
1370        osm_gps_map_redraw(map);
1371    }
1372    
1373  #endif // OSD_NAV  #endif // OSD_NAV
1374    
1375    
# Line 1596  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1748  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1748          priv->crosshair.rendered = FALSE;          priv->crosshair.rendered = FALSE;
1749  #endif  #endif
1750    
 #ifdef OSD_NAV  
         priv->nav.surface =  
             cairo_image_surface_create(CAIRO_FORMAT_ARGB32,  
                                        OSD_NAV_W, OSD_NAV_H);  
 #endif  
   
1751  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1752          priv->coordinates.surface =          priv->coordinates.surface =
1753              cairo_image_surface_create(CAIRO_FORMAT_ARGB32,              cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
# Line 1638  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1784  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1784  #endif  #endif
1785    
1786  #ifdef OSD_NAV  #ifdef OSD_NAV
1787      x =  OSD_X;      if(priv->nav.surface) {
1788      if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;          x =  OSD_X;
1789      y = (osd->widget->allocation.height - OSD_NAV_H)/2;          if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1790            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1791      cairo_set_source_surface(cr, priv->nav.surface, x, y);  
1792      cairo_paint(cr);          cairo_set_source_surface(cr, priv->nav.surface, x, y);
1793            cairo_paint(cr);
1794        }
1795  #endif  #endif
1796    
1797  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
Legend:
Removed from v.122  
changed lines
  Added in v.132